For the sake of arguement.....if I was to post that I made some changes today and now my port flows 400 would you say that my bench is not correct....because I have been there and can do that....I can 'undo' some of my work and make it flow 380-400....then I can reapply what I have learned...although it takes time to 'get it right' and get back to where I am....I have done it many times along the way....when it seemed I hit a wall I went back to point 'A' and tried again....